04882nam a2200277 a 4500 vtls000063809 KUKTEM 20251114204519.0 120920t2012 my a f m 001 0 eng d THE0004959(Local) 201905131557 SHAHRILJ 201710091628 aishah 201209200948 ida 201209200916 ida 201209200913 ida UMP TP1180.B55 R46 2012 rs Thesis Muhammad Remanul Islam Effect of fibre surface treatment on kenaf filled recycled polypropylene composite / Muhammad Remanul Islam Kuantan, Pahang : UMP, 2012 xxii, 173 p. : ill. ; 30 cm. + 1 CD-ROM Thesis (Master of Engineering (Chemical)) -- Universiti Malaysia Pahang - 2012 Bibliography : p. [163]-173 Lignocelluloses based natural fibre is being used as an alternative to traditional glass and carbon fibre in the composite materials due to its low density and higher specific properties. Furthermore, these fibres are available at a very low cost. Current work is focused on kenaf fibre based reinforced recycled polypropylene composites. In this project, initially the raw kenaf fibre was grinded to a small size (2 to 5 mm) and then mixed with recycled polypropylene (RPP) followed by extrusion through a twinscrew extruder. Fibre loading in the composite was 10, 20, 30 40 and 50% by weight. After that test specimens for tensile, flexural and impact testing were prepared through an injection moulding machine. Melt flow indexer was used to evaluate theflow property of the extruded materials. To improve the interfacial property between fibreand matrix maleic anhydride grafted polypropylene (MAPP) was used as a coupling agent with ratio of 10:1. Mechanical tests showed that significant improvement achieved due to coupling agent. Fibre surface modifications for better adhesion between fibre and matrix were carried out by three ways including alkali, ultrasound and laccase enzyme treatment. Treated fibre was then blended with recycled polypropylene with 40%fibre loading in the presence of MAPP, as 40% loading found the optimum regarding tensile performances with untreated fibre based composites. For alkali treatment, both concentration of the solution and soaking time were considered as treatmentvariables for the fibre. Mechanical tests were carried out to evaluate the optimum treatment condition for the best strength. For ultrasound, normal water was used as media for the treatment. Both temperature and sonication power was considered as treatment variables. Mechanical tests were carried out to evaluate the best strength at optimum condition of fibre treatment. Enzymatic treatment was carried out for an alternative way of fibre treatment. The composites strength was increased by 18% for fibre loading whereas coupling agent improves it by 37%. Ultrasound and alkali treatment of fibre improved the tensile strength of the composites almost by 57%. Weathering and water uptake were carried out for the composites. After that mechanical tests were performed to evaluate the properties of the composites. Thermal test like thermogravimetric analysis (TGA) was carried out to evaluate the thermal stability of the composites. It was found that, RPP degrade at one stage while composites degrade at two stages. Activation energies of the composites were calculated from the TGA analysis. Crystallinity and melting point were detected through differential scanning calorimetry(DSC) analysis. Incorporation of fibre increased the crystallinity of the polymer matrix.Structural morphology was carried out of the fractured samples to evaluate the bonding interface between fibre and matrix. Improved adhesion between fibre and matrix was found for the case of treated fibre based composites in the presence of MAPP. Fourier transform of infrared radiation (FTIR) spectroscopy was used to find out any structural change due to the treatment of the fibre and analysis found that treatment of fibre able to remove the non-cellulosic compound to a varying extent depending on treatment parameters. Response surface method (RSM) was used to optimize process parameters and one of the best set of treatment conditions was 99.96% sonication power at 94.46oC to achieve 28.86 MPa of TS. Fiber-reinforced plastics Analysis Polymeric composites Fibrous composites http://ecollib.ump.edu.my/3891/ Library access only 0 0 lcc 0 1 10000 10000 2019-09-04 0 TP1180.B55 R46 2012 rs Thesis 0000066307 2019-09-04 00:00:00 1 2019-09-04 THESIS 0 0 lcc 0 1 10000 10000 2019-09-04 0 CD 6209 | TP1180.B55 R46 2012 rs Thesis 0000066308 2019-09-04 00:00:00 1 2019-09-04 THESIS VIRTUA40 3329 3335 VTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*6501*6502*8560*9992